Study on the Formation of Glycine by Hydantoin and Its Kinetics

Zhao, Hangyu; Yu, Rong-hua; Qiao, Hao; Cun-li, Liu

doi:10.1021/acsomega.9b03868

Cited by 10 publications

(10 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to its low cost and high efficiency, its output and usage have increased year after year, accounting for around 25% of the global herbicide market . In China, the total annual production capacity of glyphosate is over 560,000 tons …”

Section: Introductionmentioning

confidence: 99%

Effects of Free or Immobilized Bacterium Stenotrophomonas acidaminiphila Y4B on Glyphosate Degradation Performance and Indigenous Microbial Community Structure

Chen

Zhang

et al. 2022

J. Agric. Food Chem.

View full text Add to dashboard Cite

The overuse of glyphosate has resulted in serious environmental contamination. Thus, effective techniques to remove glyphosate from the environment are required. Herein, we isolated a novel strain Stenotrophomonas acidaminiphila Y4B, which completely degraded glyphosate and its major metabolite aminomethylphosphonic acid (AMPA). Y4B degraded glyphosate over a broad concentration range (50−800 mg L −1 ), with a degradation efficiency of over 98% within 72 h (50 mg L −1 ). Y4B degraded glyphosate via the AMPA pathway by cleaving the C−N bond, followed by degradation of AMPA and subsequent metabolism. Y4B demonstrated strong competitiveness and substantially accelerated the degradation of glyphosate in different soils, degrading 71.93 and 89.81% of glyphosate (400 mg kg −1 ) within 5 days in sterile and nonsterile soils, respectively. The immobilized cells of Y4B were more efficient than their free cells and they displayed excellent biodegradation efficiency in a sediment−water system. Taken together, Y4B is an ideal degrader for the bioremediation of glyphosate-contaminated sites.

show abstract

Section: Introductionmentioning

confidence: 99%

Effects of Free or Immobilized Bacterium Stenotrophomonas acidaminiphila Y4B on Glyphosate Degradation Performance and Indigenous Microbial Community Structure

Chen

Zhang

et al. 2022

J. Agric. Food Chem.

View full text Add to dashboard Cite

show abstract

“…The hydantoin intermediate is stable and usually requires forcing conditions to hydrolyze to the amino acid. 25 However, under these reaction conditions where ammonia is formed by the hydrolysis of DAP, heating at 80 °C was enough to hydrolyze 6 to alanine, as con rmed by the relatively rapid hydrolysis of 5-methylhydantoin 6 in the presence of added DAP versus its absence (Supplementary Fig. 21).…”

Section: Resultsmentioning

confidence: 89%

Prebiotic synthesis of α-amino acids and orotate from α-ketoacids potentiates transition to extant metabolic pathways

et al. 2022

View full text Add to dashboard Cite

The Strecker reaction of aldehydes is the preeminent pathway to explain the prebiotic origins of a-amino acids. However, biology employs transamination of a-ketoacids to give rise to amino acids which are then transformed to nucleobases, implying subsequent evolution of the biosynthetic pathways -abiotically or biotically. Herein, we show that a-ketoacids react with cyanide and ammonia sources to form the corresponding a-amino acids -via the Bucherer-Bergs pathway. An e cient prebiotic transformation of oxaloacetate to aspartate via N-carbamoyl aspartate enables the simultaneous formation of dihydroorotate, paralleling the biochemical synthesis of orotate as the precursor to pyrimidine nucleobases. Glyoxylate forms both glycine and orotate, and reacts with malonate and urea to form aspartate and dihydroorotate. These results, along with the previously demonstrated protometabolic analogs of the Krebs cycle suggest that there can be a natural emergence of congruent forerunners of biological pathways with the potential for seamless transition from prebiotic chemistry to modern metabolism.

show abstract

“…Legg et al studied the microscopic nucleation process of iron oxyhydroxide nanoparticles. Therefore, it is very essential to carry out research on the kinetics of the synthesis of α-FeOOH. , How to improve the mass transfer efficiency is the key point to improve production efficiency. , In this study, the macrokinetics in the falling film tower system was investigated to better understand the effect of high mass transfer efficiency on the reaction rate.…”

Section: Introductionmentioning

confidence: 99%

“…21,22 How to improve the mass transfer efficiency is the key point to improve production efficiency. 23,24 In this study, the macrokinetics in the falling film tower system was investigated to better understand the effect of high mass transfer efficiency on the reaction rate. The pickling wastewater is produced during the pickling process of steel; it has strong acidity and contains around 60− 250 g/L of Fe 2+ .…”

Section: Introductionmentioning

confidence: 99%

Efficient Synthesis of α-FeOOH from Pickling Wastewater in Falling Film Tower and Its Kinetics

et al. 2021

View full text Add to dashboard Cite

An efficient way to synthesize α-FeOOH from pickling wastewater in a falling film tower was proposed for the first time. This method overcomes the shortcomings of the traditional air oxidation method, and its production efficiency is increased by 16 times. The purity of α-FeOOH synthesized from pickling wastewater can reach 96.3%, and the iron recovery rate is greater than 90%. At the same time, we have systematically studied its kinetics in the falling film tower. The reaction rate constant k at different temperatures was also determined with the activation energy E a = 32.2497 kJ/mol and the pre-exponential A = 47.4132 s −1 . In addition, based on the double-film theory, a corresponding macrokinetic model was established. Also, the Hatta number in the reaction system was obtained, which proved the excellent gas− liquid mass transfer performance in the falling film tower. This work provides a promising method for the efficient production of α-FeOOH and the recycling of pickling wastewater.

show abstract

Study on the Formation of Glycine by Hydantoin and Its Kinetics

Cited by 10 publications

References 29 publications

Effects of Free or Immobilized Bacterium Stenotrophomonas acidaminiphila Y4B on Glyphosate Degradation Performance and Indigenous Microbial Community Structure

Effects of Free or Immobilized Bacterium Stenotrophomonas acidaminiphila Y4B on Glyphosate Degradation Performance and Indigenous Microbial Community Structure

Prebiotic synthesis of α-amino acids and orotate from α-ketoacids potentiates transition to extant metabolic pathways

Efficient Synthesis of α-FeOOH from Pickling Wastewater in Falling Film Tower and Its Kinetics

Contact Info

Product

Resources

About